This is the university final year project . I worked a lot on making the design and efficient technique to maintain the slow cooling of peltier for 2-3 hours without power. The design is unique and can contain 8 can capacity. all the load is powered by the separate battery and solar plate placed on the roof of the car. last test was so awesome that 2 peltiers achieved 0 degree and it maintain its temperature upto 2-3 hours with the loss of just 4 degree without power supply. this pcb contain power system of peltiers and charging unit for battery will be attach to this pcb. separate supply for cooling system is also take from it.